摘要
为了实现穿戴式计算机系统的无线通信,本文对PIFA(平面倒F天线)的结构和原理进行了研究,并实际设计了一种工作于无线局域网2.45GHz频段的穿戴式平面印刷PIFA,选用特征阻抗为84Ω的微带线进行馈电,一是便于天线穿戴于人体,二是为了实现天线的阻抗匹配;实际制作的天线尺寸为40×40×2mm3,在中心频率2.45GHz处获得1.5%的相对阻抗带宽,增益达2.7dBi;从回波损失曲线和辐射方向性图两个方面将实际制作的PIFA的测量结果与CST仿真结果进行了对比分析,结论是:采用PIFA天线具有小尺寸和低剖面结构的优点,且加工简单、成本低,可用于穿戴系统的无线通信设备。
To solve the wireless communication between devices among wearable computer system, the paper presents a wearable planar printed PIFA （planar inverted F antenna） which operates at 2.45GHz. The antenna is fed by using an 84-Ω microstrip line which makes it easily wearable and matching to the 50-ΩSMA connector. The size of the PIFA is only 40×40×2mm^3 with 1.5% return loss bandwidth and 2.7dBi gain. Finally , from the return loss curves and radiation directional diagram two aspects of the actual measurement results produced by PIFA and the CST simulation results are compared and analyzed, the conclusion is the designed antenna has the advantages of low profile, easily manufactured and low cost, and is a promising candidate for wireless communication devices in wearable system.
出处
《计算机测量与控制》
CSCD
北大核心
2010年第5期1168-1170,共3页
Computer Measurement &Control
